Basic Research on the Thermal Characteristics of Educational Coffee Roasting Machines

Abstract

In this research, in educational coffee roasting machine, a parallel type hole was made in the plate installed between stove and rotating drum, and the effect of the perforating ratio of plate (R = 0, 7, 20[%]) on the temperature of the roasted coffee bean was investigated. The temperature was measured with an infrared camera. The temperature rise of roasted coffee beans can be accelerated as of increasing the influence of heat transfer by changing perforating ratio of plate R. Although gas consumption can be suppressed, it became clear that the rapid temperature rise of coffee beans is not always a good condition for coffee roasting.